Morpholine → 4-(1-acetyl-1,2,3,6-tetrahydro-4-pyridinyl)morpholine

Participants

Reaction Steps

According to Scheme 1, step 1: A mixture of morpholine (67.85 g, 0.779 mol), 1-acetyl-4-piperidone (99.95 g, 0.708 mol) and para-toluenesulfonic acid monohydrate (0.366 g, 2.1 mmol) in toluene (300 ml) was heated in a Dean-Stark trap apparatus for 16 h at reflux. Solvents were evaporated in vacuo to give 149 g of 1-(4-morpholin-4-yl-3,6-dihydro-2H-pyridin-1-yl)-ethanone (1) which was used in the next step without any further purification.

Provenance & Evidence